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Malicious package

ded-pwa-c-mappingnpm

Advisory published Updated

ded-pwa-c-mapping is a confirmed malicious npm package (MAL-2026-13535) that executes malicious code on install (malicious version 35.8.7). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in ded-pwa-c-mapping (npm)

MAL-2026-13535
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall ded-pwa-c-mapping

What this malware does

On require of the package, helpers.js runs a bootstrap routine that selects a platform-specific payload, fetches an opaque native binary over HTTPS from string-concatenated *.workers.dev hosts (oob-worker.cf100-416.workers.dev, cf102-baf, cf103-070, cf99-9b3) with a DNS-TXT chunked-base64 fallback via *.dl.wel1.ru, writes it to /var/tmp or %TEMP% under a disguised name (.cache<hex> or dotnet_diag_<hex>.exe), chmods 0755, and spawns it detached via /bin/sh -c or cmd /c start. Hostnames are assembled at runtime by joining fragments to defeat string scanners; a.analytics_state marker file throttles re-execution, and DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK opt-out variables are referenced to frame the behavior as telemetry. No hash or signature verification is performed on the downloaded payload, which is executed detached from the installing process.

Malicious versions

1 flagged
35.8.7

Indicators of compromise (SHA-256)

111c9e7975f791388e592fc9d4e6b492ce8d7239a902d148a8fc1acf40f0cf18

Detection & response playbook

Malicious package

  1. Find it

    Search your lockfiles and build artifacts for ded-pwa-c-mapping (version 35.8.7).

  2. If you installed it — respond

    Remove ded-pwa-c-mapping from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

  3. Did it already run?

    If ded-pwa-c-mapping was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. ded-pwa-c-mapping on npm has been identified as a malicious package (version 35.8.7 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-017021

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks ded-pwa-c-mapping-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

Malware detection Runtime egress monitoring

Explore

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ded-pwa-c-mapping (npm) malicious package — MAL-2026-13535 | O3 Security